01 · The medium
Water is not a passive filler
Roughly 60% of adult body mass is water, and almost none of it is idle. It carries dissolved minerals into cells, moves metabolic waste out, transports hormones, and keeps the electrical gradients across membranes that make nerve and muscle signalling possible.
Because water is the medium rather than the message, its composition matters. Two glasses with the same volume but different mineral content behave differently once they reach the intestinal wall and the bloodstream.
This is the honest core of the “cellular hydration” idea: hydration is a transport question, not only a volume question.








